Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?

With no annotations provided, the description carries the full burden of explaining behavioral traits, but it only provides the weak signal 'Public'. It does not disclose whether the tool performs a read, whether inputs are ignored, what side effects occur, or what the response format is. The detailed 'discarded' and 'no disk access' notes are in the input schema, not the description, so they do not compensate here.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Is the description appropriately sized, front-loaded, and free of redundancy?

The description is a single, front-loaded sentence with no filler or repetition. It is concise and immediately states the core resource. While it may be too terse for the tool's complexity, the conciseness itself is not the problem.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

For a tool with 9 optional parameters, no annotations, and no output schema, the description is far from complete. It does not explain what the record contains, what the agent should pass, whether any input is required, or what the return value will look like. The input schema covers parameter syntax, but overall context for invoking the tool safely is missing.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

Schema description coverage is 100%, with each of the 9 optional parameters individually documented, so the schema already provides the needed parameter meaning. The tool description itself adds no parameter semantics and does not clarify how any parameter relates to the ISO 3166-1 record. Baseline 3 is appropriate because the schema carries the load.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Does the description clearly state what the tool does and how it differs from similar tools?

The description names a specific resource, 'Public ISO 3166-1 record for TN', so an agent can infer the topic of the tool. However, it lacks an explicit operation verb such as 'retrieve', 'return', or 'validate', leaving the actual action vague. It also does not compare itself to sibling tools.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Does the description explain when to use this tool, when not to, or what alternatives exist?

The description implies the tool is relevant when an agent needs the public ISO 3166-1 record for Tunisia (TN), but it never states this explicitly. There are no conditions, exclusions, or alternatives given. The intended use is left to inference rather than clear guidance.

Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.